<?hh
/* Prototype  : proto array get_declared_traits()
 * Description: Returns an array of all declared traits.
 * Source code: Zend/zend_builtin_functions.c
 * Alias to functions:
 */

trait MyTrait {}
interface I {}
class MyClass {}
<<__EntryPoint>> function main(): void {
echo "*** Testing get_declared_traits() : basic functionality ***\n";

// Zero arguments
echo "\n-- Testing get_declared_traits() function with Zero arguments --\n";
var_dump(get_declared_traits());

foreach (get_declared_traits() as $trait) {
    if (!trait_exists($trait)) {
        echo "Error: $trait is not a valid trait.\n";
    }
}

echo "\n-- Ensure trait is listed --\n";
var_dump(in_array('MyTrait', get_declared_traits()));

echo "\n-- Ensure userspace interfaces are not listed --\n";
var_dump(in_array( 'I', get_declared_traits()));

echo "\n-- Ensure userspace classes are not listed --\n";
var_dump(in_array( 'MyClass', get_declared_traits()));


echo "Done";
}
